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Diffusion‐Induced Interface Migration and Mechanical Property Improvement in the Lead Magnesium Niobate–Lead Titanate System
Author(s) -
Kim Min–Soo,
Fisher John G.,
Lee HoYong,
Kang SukJoong L.
Publication year - 2003
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2003.tb03598.x
Subject(s) - materials science , indentation , vickers hardness test , microstructure , composite material , lead titanate , columbite , ceramic , hardness , ferroelectricity , dielectric , optoelectronics
Diffusion–induced interface migration (DIIM) is a technique for modifying the microstructure and mechanical properties of ceramics. In the present study, we investigated DIIM in 0.65Pb(Mg 1/3 Nb 2/3 )O 3 ·0.35PbTiO 3 (mol fraction) (PMN–PT) ceramics and its effect on mechanical properties. PMN–PT samples were fabricated using the Columbite precursor method and then surface–modified by heat treatment after packing with PbTiO 3 powder to induce DIIM. Evaluation of mechanical properties using Hertzian indentation and Vickers indentation showed that the critical load for yielding and surface hardness of the PbTiO 3 –packed PMN–PT samples were higher than those of the unpacked samples. Thus, the mechanical properties were improved in the samples with a DIIM layer. These results showed that the reliability of mechanical properties of PMN–PT samples is improved by inducing DIIM at the surface.